Citroen C3 2006 Central Locking Not Working

[dipsv360]

Hi all,
I'm new to this site but needed some help with my citroen c3.
I just bought this car from auction however someone messed around with ecu and fitted a 1.1 ecu.

At the moment the doors don't lock (only the boot does), its got the engine management light on and anti pollution light is also on.

The car starts and drives
Car came with 2 keys 1 old one does not work and 1 new does work and starts the car
Also after market locking fob does not work

i had it checked out and was told to replace it with a 1.4 8V KFV ECU kit by Valeo which i cant find anywhere or was hoping if someone could fix this for me due to me having prostate cancer so i am unable to do most jobs now i used to be able to do.

[GiveMeABreak]

Hi

Sorry to hear that. The information is really not much use as it stands, but I appreciate you may not be able to get the answers:

What ECU was replaced? If this was an Engine ECU or a BSI, they have to be matched up along with the transponder fobs. So unless it is something else you are referring to all these three items would of needed replacing for a matched set.

Next - BSIs are not derived from engine capacity - they are matched by correct part number.

So I suspect if you have an incorrect BSI and engine ECU fitted you will have incompatibilities with the vehicle's options and systems. The only way to ascertain what you should have is by determining the correct Engine ECU and BSI you have fitted and comparing this with the correct part numbers for your vehicle.

That's probably why it was off-loaded in an auction in the first place I'm sorry to suggest.

So this is going to take some time and money to resolve - identifying the correct part numbers of the components I mentioned, and if they are wrong, replacing them with a new correct matched set, and then configuring the BSI to match the specific options that the car was fitted with as it left the factory (because the BSIs can be fitted to a specific range of vehicles, but still need configuring). If not, then the car will malfunction / have random problems.

All this assumes that the problems are related to an incorrect BSI / Engine ECU of course and that there are no other additional issues - but further troubleshooting isn't going to help until we know what the situation is regarding the Engine ECU and the BSI.

It is possible that you do have the correct kit fitted of course - but may not of been configured properly - which required a Lexia system.

I don't know what you paid for it - but you really need to weigh up the cost of troubleshooting and potentially replacing the ECUs / programming against writing it off and putting it down to experience....

Again, there are a lot of maybes here but until we have some detailed information we won't really be able to assist. We can help you determine the correct engine ECU and BSI part numbers from your VIN (post that up here). You will just need to find the part numbers (usually on the attached labels) of the BSI and Engine ECU that are currently fitted in the C3.

[dipsv360]

Hi
The VIN NO: VF7**************[VIN obfuscated, can be read by forum staff]
Thanks dips

[GiveMeABreak]

Ok, so you have a C3 II 5 DOOR SALOON 1.4 i 75 (TU3A) Manual gearbox 5

The Engine Management ECU is a Johnson Controls unit. Original Citroen Part number was 1939JK, replaced later with 1943FL.

The BSI (ANC Control Unit in the passenger compartment glovebox) was originally part number: 6580X4, replaced with 6580NG, or 6580X5.

These numbers may or may not be on the labels - what you may find is a international part number that begins 96 or 98, but at least you have the main original Ctroen part numbers now.

[dipsv360]

Hi
Can i post pic of what's fitted
thanks dips

[myglaren]

Hi
Can i post pic of what's fitted
thanks dips

You can, it would help a lot.

Image posting info here.

[dipsv360]

Hi
thank you

[myglaren]

VF7**************[VIN obfuscated, can be read by forum staff]
VF7**************[VIN obfuscated, can be read by forum staff]

VIN images removed from post above

[GiveMeABreak]

Ok so your vehicle is a 1.4i 75 (TU3A) engine
The donor vehicle was a 1.1i 60 (TU1A).

So that's one reason why you will be having issues, so the wrong engine ECU was fitted.

Your BSI part: 6580X4, 6580NG or 6580X5
Donor BSI (assuming this came from the same donor vehicle): 6580TR, 657079 or 6580TS

So as you can see both parts are wrong.

So you need to be looking at least for a C3 of the same engine as your own to be on the safe side and then when you have located one, check the part numbers of the engine ECU and BSI. Then that will at least get it to the stage where the parts are correct.

[dipsv360]

Hi,

That makes sense, does anybody know where to source the correct ECU unit from as i cant seem to find it anywhere? I've had a look on auction sites but was hoping someone on the forum would be able to guide me in the right direction as to where i am able to purchase it. Or if anybody knows a Citroen specialist local to me in the Birmingham area where i would be able to get the correct ECU?

[GiveMeABreak]

This is going to be the issue:

Normally, if one needed to replace an engine ECU or a BSI - they would have the label (as per your last photo) so that the Manufacturer part number could be seen (A), along with the hardware version part number (B) and also the software version (C), as I have shown on your picture below:

This would ensure the correct part and that the hardware and software versions are also the same. Unfortunately if you don't have access to your original ECU or BSI, the original Citroen part number is not enough to go on, as these would normally be configured at new to your car. The same Citroen part may have different hardware and software versions - which is why the VIN is specified on order for a replacement.

Without this, you could search on the Citroen part ' 1939JK' or '1943FL', but that won't guarantee the exact hardware and software for your specific vehicle.

Most decent re-sellers would ask you to match all the codes (as per the photo) for an exact match.

I think this is one reason why the last person installed a non-100% compatible unit and BSI set - as the original codes were not properly matched.

[dipsv360]

Hi,

Thanks Marc for your response. I will continue looking.

Is there anyway i can find the make of the original ECU that should have been in my C3? For example Valeo, Bosch etc?

If anybody on the forum is breaking the same car i am willing to buy it from them. Also looking for a Citroen specialist/LXIA specialist near me?

[GiveMeABreak]

It was a Johnson Controls unit, now Valeo

[S_Zman13]

Hi there Marc
I have a similar problem with my 2007 1.1 c3 desire, whereby the key fob does work, however it only works when it is right next to the ignition barrel. After forums upon forums and videos upon videos for months on end, I ended up taking apart the whole car and checking everything. I've tried the following:
Bsi reset
battery connectors removed then bsi reset
battery changed and recharged
ran on diagnostics and changed the key fob twice.
removed the BSI to check any faulty relays, but after requesting for where the central locking relay could be, all i received was wiring diagrams that i couldn't understand whatsoever

I also am completely a beginner when it comes to electricals in cars.

After legitimately shedding blood sweat and tears, I've ended up parking it in the back and one day to just pay a couple hundred quid to fix it, but i still have hope in someone coming through and help me fix it.

is there anyway in which i could fix this? Honestly this would mean a lot to me as i really like this car and want to keep it
Many thanks
Salih

[ozvtr]

Hi there Marc
I have a similar problem with my 2007 1.1 c3 desire, whereby the key fob does work, however it only works when it is right next to the ignition barrel. After forums upon forums and videos upon videos for months on end, I ended up taking apart the whole car and checking everything. I've tried the following:
Bsi reset
battery connectors removed then bsi reset
battery changed and recharged
ran on diagnostics and changed the key fob twice.
removed the BSI to check any faulty relays, but after requesting for where the central locking relay could be, all i received was wiring diagrams that i couldn't understand whatsoever

I also am completely a beginner when it comes to electricals in cars.

After legitimately shedding blood sweat and tears, I've ended up parking it in the back and one day to just pay a couple hundred quid to fix it, but i still have hope in someone coming through and help me fix it.

is there anyway in which i could fix this? Honestly this would mean a lot to me as i really like this car and want to keep it
Many thanks
Salih

Just to clarify, you are only having trouble with the central locking? This thread covers engine ECU's and BSI's. Just checking.
If the fob works at all and the button on the dash also works, it is not a problem with the BSI or the relays there in.
Have you changed the battery in the fob?
A possibility is that the fob is damaged if replacing the battery does not work.
Most likely culprit is the fob or the HF module in the COMM2000. However, it's unlikely to be the HF module.
FYI the receiver for the central locking fob (HF module) is in the top of the COMM2000 at a point between the steering wheel and the instrument panel. As a work-around have you tried the fob against the windscreen in front of the driver?
It's virtually impossible to replace the fob from a Mk1 (pre face lift) C3 without getting a brand new fob from Citroen. The cost is 110 pound for the key and extra for coding it in.